Shears



Tus

EARs Filed Oct. 11, 1923 2 Sheets-Sheet 1 I \\\\\\\\\\\\s m Nov. 24- 1925. 1,562,931

J. B. T YTUS SHEARS Filed Oct. 1, 1923 2 sheat s-Sheet 2 Patented Nov. 24, 1925.

, UNITED STATES 1,562,931 PATENT OFFICE.

JOHN B. TYTUS, OF MIDDLETOWN, OHIO. ASSIGNOR TO THE AMERICAN ROLLING MILL COMPANY, OE'MIDDLETOWN, OHIO, A CORPORATION OF OHIO.

' SHEARS.

Application filed October 11, 1923. Serial No. 667,827.

To all whom it may concern.

Be it known that I, JOHN B. TrTUs, a citizen of the United States, and'a resident of hIlCldll3OW11,lI1 the county of Butler and State of Ohio, have invented certain new and useful Improvements in Shears, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specifica tion. c

My invention relates to slitting and trimming shears as en'iployed in'the rolling mill for trimming or slitting off the side edges, and trimming off the irregular ends of sheets of metal.

The operation of trimming and slitting sheet metal, as carried on in the past, has been slow, relatively to otheroperations, and usually requires the use of very large and cumbersome machinery in order to accomplish a speedier operation.

It is the object of my invention to provide a mechanism, which operates on one sheet at a time. and acts to square up the sheet, hold it against canting and at the same time trim the edges by slitting away all metal over the required width, and which then moves the sheet to another shears which at a single operation cuts off both ends to a desired length of the piece.

Amongother devices which are employed by me in my mechanism are devices newvin the art tor holding a sheet so that it. moves in a perfectly straight line froin which it cannot deviate. during the edge slitting opera tiou, and the placing of the end trimming mechanism so that the operation of slitting the side edges of the sheet takes place while the sheet is being ted to the end trimmer.

I adjust the spacing of the double side trimming or. slitting wheels by bodily shifting the position of one of the housings and in the same manner adjust the spacing'o't the I end trimmers.

My various objects and advantages, I accomplish by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed.

' In the drawings:

Figure 1 is a side elevation of. the com-- plete device.

Figure 2 is a top plan View of the complete device.

Figure 3 is a detail view of the slitting knives, as on line 3-3 of Figure-2. i

. disks .in either Figure 4 is a detail diagrammatic section showing the gripping rolls, as on the line 4-4 of Figure 2. I

. Figure 5 is a view on a larger scale of the end trimming shears. r

l have illustrated the entire device as mounted on the mill floor 1. roller table or other delivery means for the sheets as at 2, on which the operators set the sheets at the beginning of the operations. -There are two housings, 3, 4, for the slitting shears, these housings of the usual construction of shear housings, and having a drive from the motor 5. The housing -t. is adjustable by any desired means, away from the housing 3, the drive shafts being of telescoping character (not shown). I do not claim any novelty .in arranging two slitting shears to move bodily with relation to each other, and any desired form of housing and shifting arrangement may be provided.

The cutters are in the form of disks 6 and 7, arranged in pairs on each side of the slitting space between the housings and the sheet rides in over the lower disks 6, and is sheared against/the outer edges of the disks 6 and the inner edges-"of the disks 7.

Ithas always been found quite difficult to. guide a sheet of metal between a pair of rotary trimming shears as inside edge trimming, because of the tendency of the sheet to move out of a straight line. Thus the cutting disks have to be ground, and if they happen to be a little smaller on one side of the cutting space than on the other, the feeding action of the disks be in a straight line. Other features "also contribute to this irregularity of food, such as a slight difference in'gauge at one edge of the sheet than at the other, and such as a slightly, different relative positioning of the air.

I have provi ed, however, a device which enforces a rectilinearpath to the sheet while being slit or side edge trimmed.

At a position as close as practical to the cutting disks, I locate a series of rollers, of which I have shown three, this'being sufficient, between which the sheet must pass. These rollers are arranged so as to cause the sheet to behd down between them, thereb giving a large surface contact therewtit 1 with the several rollers.

I have illustrated three rollers 8, 9 and 10, of which the rol er 10 lies between the 0 h? There is a l and the intermediate roll ini 1 y use of this staggered angles to their axes,

- 35 housing 21 is mounted 40 be predetermined, t

. 45 a trim at one end bone clutches of. the two shears, by down-past two, with its periphery below the levelof the peri heries of the other two rolls. The three ro ls are driven by means of cars 11, so that the pair revolve inthe same irectron revolves in oppos te or any two of the three rollers may direction,

riven. As indicated 1n Figure 4, the

bed

sheet 12, -is fed positively forward to the shears by all the rolls, and it is caused to bend down as at 12, thereby providing for a strong grip on the sheet. '110 bend the sheet back, a roll 10' is provided or some other guide to prevent the sheet from feedat an angle.

roll arrangement, find that,I can positively insure that a sheet while passing through the rolls w1ll be fed so that each portion passes throu h the arranged rolls, in a direction at rig t i so that by starting the sheet straight, it will always remain straight with relat1on to the cutting disks.

-From the cutting disks, the sheet asses along an intermediate table formed 0 roll- 35 ers 13, which table is here set at a slant, to carry the sheet up to the end trimming device. The speed at which the sheet is projected along this table carries it well between the simultaneously operating end trimmers.

I am not aware of any one in the past endeavoring to trim both ends of a sheet at the same time, and by. doing so, I save a. great deal of'time, labor and material. I show two shear housings and 21, of which the to move along the base or track 22, by means of a cog wheel device '23,"as is customary in adjustable shear housings. The other housin is fixed and since the two cutting lines of t e housin e operator can 'shif t the piece endwise until he gets it so positioned that the trimmin will remove-the scrap at 3 both ends of the gheet simultaneouslyfwitb out running the danger of making so deep are rods 26, 27, of which the one has loops over the other. These 28'thereon to engage v as to indicate the dis rods are calibrated so time apart of the cutting blades of the two shears, and as the are connected fast to the the ing is besttaken where a mark not shown) on the end of the rod 26,

- lies against th mechanism provides for uick sett' of the shear and reduces ch q mg ances of .error' on the part of the operator in applying a ruler or ta I have own the'trim mechanisms for the which the. u per shear blades 29 are b ht 0 lower shes-r blades ug scribed and onto t m1ng shears'lastabove described.

These top of the shear housing in end requires the trimming shears, when the. s

can-

that the scrap at the, other 'end will not lend s'uflicient good metal to e scale 28' onthe rod 27..

with relation to each other, means. of' i in th form of push rods 31. These rods when pushed upwardly serve to operate the usual mechanism for a plying'thrust to the upfier shear blades. The tripper and trea es shown are ofany standard design.

Each tripper rod is mounted on a lever 32, these two levers being held in normal osition by means of springs 33. A treadle ar 34, extends along beneath the'bedof the machine between the tw'olevers, and is se; H cured pivotally at to the one on the movable shear housing, and has a loop 36 on its other end, which engages fairly loosely over the lever.32 on the fixedshear housing.

A depression of the treadle bar, as by applying the footto the step 37 thereon, acts to trip both shear blades at once. The sheets are fed one at a time or if found desirable, several at a time, from the side trimming shears, alon the slanting table dee table of the end trim- -The operator pushes them alonguntil they come into desired position, and then trips both shears simultaneously. The sheet is then trimmed to an absolute length, and the operator then pushes the end of the sheet to enga ement with theyfeed. out rolls.

ls areshown at 39, and are driven by a belt 39, from the driven shaft 40 at the question.

The shearing operation for trimming the handle t e sheets as rapidly as they are side 'trimme A crew is necessar for'the side leets must be lifted from a truck and placed on the feed table leading to the trimming shears, but two or three men are usually suflicient to handle this end of the operation.

The machine described gives much greater production with the" same labor, as other sheet trimmers, gives more accurate trimming, and saves. loss in spoiled pieces or wasters. I

Having thus described I'claimas new and ters Patent, is

1. A shears for trimming the ends of my invention, what desire to secure by Let- .metal sheets comprising a pair of housings use of but one man, to

lot

adjustable with relation to each other, and

having shear blades. therein, a'table to support a sheet between said housin a gauge securedto the, two housings, an calibrated to indicate the spacing between the shear blades of the two housmgs, and means for settingi'into operation the shear. blades of both ouslngs, "said means comprisinga common control member. 2. shears for trimming comprising a pair ofhousmgs ad'ustable a a table or supporting a sheet between said two housings, a sto on one housing for the end of a sheet, and; cod rolls driven to engage; and

. metal sheets I i 3. A cutting machine for trimming metal sheets,,adapted to slit the said sheet while it is moving, and means to hold the sheet in a fixed alignment, during said slitting.

operation, comprising a set of rolls arranged in staggered relat on in such a ,Way as to cause the sheet to bend out of it single plane Y in passing between them.

4. A cutting machine for trimming metal sheetsfadapted to slit the said sheet While it is moving, and means to hold the sheet in fixed alignment during said slitting opera tion, comprising a set of rolls arranged in staggered relation in such a Way as to cause the sheet to bend out-of a single plane'in passing between them, said rollers being driven to acomplish Sheet. 7

5. A cutting machine for trimming metal sheets, adapted to slit the said sheet While it'is moving, and means to hold the sheet in a fixed alignment during said slitting operation," comprising a set of rolls arranged in' staggered. relation in such a Way as to cause the sheet'to bend out of a single plane in passing between them, said rollers being driven to accomplish a "feeding action on the sheet, and located close to the slitting device of said shears.

- JOHN B. TYTUS.

a feeding action on the 

